Give below are the symbols of some elements: Mg, K, Zn, H, Ag, Cu, Al, Fe
Choose from the above.
The metal whose oxide decomposes on heating.
When metal oxide decomposes by heat, it gives the metal and oxygen. It requires a lot of temperature for metal to get decomposed, only mercury(Hg) is the metal that decomposes easily.
HgO → Hg +O2